<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 08:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="14.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.24 (297) 08:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202629710240800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.082" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.640" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.479" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="320.255" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.526" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.883" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.824" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.137" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.541" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 246.094 247.188 248.281 249.375 250.469 251.563 252.656 253.750 254.844 255.938 257.031 258.125 259.219 260.313 261.406 262.500 263.594 264.688 265.781 266.875 267.969 269.063 270.156 271.250 272.344 273.438 274.531 275.625 276.719 277.813 278.906 280.000 285.000 285.000 285.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 310.000 315.000 315.000 315.000 320.000 330.000 330.000 335.000 340.000 345.000 355.000 365.000 382.291 401.474 422.877 446.910 474.089 505.075
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 75 78 78 78 75 75 78 0 0 81 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 1.171875 1.953125 -2.734375 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="176">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.812 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.215 140.0 145.0 150.0 155.0 160.0 165.0 166.429 170.0 175.0 180.0 185.0 190.0 194.644 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 320.255 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.317 0.415 0.464 0.479 0.473 0.453 0.419 0.366 0.283 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.235 0.285 0.334 0.384 0.433 0.479 0.487 0.614 0.774 0.958 1.166 1.404 1.679 1.995 2.345 2.702 3.036 3.33 3.582 3.795 3.976 4.13 4.261 4.372 4.466 4.544 4.609 4.66 4.699 4.727 4.744 4.75 4.75 4.746 4.735 4.717 4.692 4.661 4.624 4.582 4.535 4.484 4.428 4.37 4.308 4.244 4.177 4.108 4.037 3.965 3.892 3.818 3.743 3.668 3.592 3.516 3.441 3.365 3.29 3.215 3.141 3.068 2.995 2.924 2.853 2.783 2.714 2.646 2.58 2.514 2.45 2.387 2.325 2.264 2.205 2.147 2.09 2.034 1.98 1.927 1.875 1.824 1.774 1.726 1.679 1.633 1.588 1.544 1.501 1.46 1.419 1.38 1.341 1.304 1.267 1.232 1.197 1.164 1.131 1.099 1.068 1.038 1.008 0.98 0.952 0.925 0.899 0.873 0.849 0.824 0.801 0.778 0.756 0.734 0.713 0.693 0.673 0.654 0.635 0.617 0.6 0.582 0.566 0.55 0.534 0.519 0.504 0.489 0.475 0.462 0.448 0.436 0.423 0.411 0.399 0.388 0.377 0.366 0.355 0.345 0.335 0.326 0.316 0.307 0.298 0.29 0.281 0.273 0.265 0.258 0.25 0.243 0.236 0.229 0.223 0.216 0.21 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.479" PeakHeight="110.0" Num="3" Error="0.0">
-21.942 4.115 -0.361
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.479" EndFrequency="4.75" PeakHeight="320.255" Num="5" zHalfNm="250.526" Error="3.0">
-155.724 43.357 -18.18 6.369 -1.433
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.644" Depth="0.279"/>
<TopsideChapman PeakHeight="320.255" PeakDensity="279931.75" PeakScaleHeight="53.541" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
